In this blogpost I want to explore what possibilities elasticsearch gives us for storing fields and retrieve them at query time from the performance point of view. In fact, lucene, the underlying library upon which elasticsearch and solr are built, provides two ways for storing and retrieving fields: stored fields and docvalues. In addition, elasticsearch … Continue reading Elasticsearch _source, doc_values and store Performance
Offline Search Quality Evaluation: Rated Ranking Evaluator (RRE)
Introduction With Rated Ranking Evaluator Enterprise approaching soon, we take the occasion of explaining in details why Offline Search Quality Evaluation is so important nowadays and what you can do already with the Rated Ranking Evaluator open-source libraries. More news will come soon as we are approaching the V1 release date. Stay tuned! Search Quality … Continue reading Offline Search Quality Evaluation: Rated Ranking Evaluator (RRE)
Elasticsearch Alias Field Type
In this blog post we will briefly recap things we can't do when using the alias field type in Elasticsearch.
Introducing Weighted Synonyms in Apache Lucene/Solr
This blog post is about our latest contribution to the Apache Lucene/Solr project:introducing the ability of assigning different weights to synonyms.This contribution aims to help users that deal with complex synonyms dictionaries where it's important to associate a numerical weight to each of them, for example to boost the ones that are more important in … Continue reading Introducing Weighted Synonyms in Apache Lucene/Solr
London Information Retrieval Meetup February
After the very warm reception of the first year, the fourth London Information Retrieval Meetup is approaching (11/02/2020) and we are excited to add more details about our speakers and talks!The event is free and you are invited to register : https://www.eventbrite.com/e/london-information-retrieval-meetup-february-2020-tickets-89056738101 Our first speaker is Anna Ruggero, one of our R&D software engineers: Anna … Continue reading London Information Retrieval Meetup February
Road to Rated Ranking Evaluator Enterprise
It was the spring of 2018, Andrea was strenuously working on a customer project, continuously tuning search configurations and checking the ground truth for certain queries manually. That was pretty much the standard at the time, the brilliant Quepid[1] from our friends at Open Source Connection helped in some use cases, but there was nothing … Continue reading Road to Rated Ranking Evaluator Enterprise
London Information Retrieval Meetup October
After the very warm reception of the first and second edition, the third London Information Retrieval Meetup is approaching (21/10/2019) and we are excited to add more details about our speakers and talks!The event is free and you are invited to register : https://www.eventbrite.com/e/london-information-retrieval-meetup-october-tickets-74403100677 Our second speaker is Andrea Gazzarini, our founder and software engineer: … Continue reading London Information Retrieval Meetup October
London Information Retrieval Meetup June
After the very warm reception of the first edition, the second London Information Retrieval Meetup is approaching (25/06/2019) and we are excited to add more details about our speakers and talks!The event is free and you are invited to register : https://www.eventbrite.com/e/london-information-retrieval-meetup-june-tickets-62261343354Our first speaker is René Kriegler, freelance search consultant and search engineer : René Kriegler René has … Continue reading London Information Retrieval Meetup June
Haystack 2019 Experience
This blog is a quick summary of my (subjective) experience at Haystack 2019 : the Search Relevance Conference, hosted in Charlottesville (Virginia, USA) from 24/04/2019 to 25/04/2019.References to the slides will be updated as soon as they become available. First of all my feedback on the Haystack Conference is extremely positive.From my perspective the conference … Continue reading Haystack 2019 Experience
Synonyms and Stopwords: Vademecum
In this post we'll cover two additional synonyms scenarios and we'll try to summarise all previous tips in a coincise form. Following the approach of the previous posts [1] [2] [3], everything can be applied both to Apache Solr and Elasticsearch. Preconditions Synonyms and stopwords at query time: this is not just a "theoretical" constraint; … Continue reading Synonyms and Stopwords: Vademecum